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Question

Find all the numbers between 20 and 40 that are divisible by:

(d) 2 as well as 10


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Solution

Write all the numbers between 20 and 40 that are divisible by 2 as well as 10.

We know that a number is divisible by 2, if the digit at the ones place is an even digit, i.e., the digit at the ones place is 0,2,4,6 or 8. and a number is divisible by 10, if its ones place is 0.

That means a number is divisible by 2 as well as 10 if its ones place is 0.

Therefore, the number 30 is divisible by 2 as well as 10.

Hence, the number between 20 and 40 that is divisible by 2 as well as 10 is only 30.


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